Samsung K155A TXJ1366 Service Manual page 20

5-3 Horizontal Line Appears
Abnormal
Check Whether
a horizontal line appears in
the service mode..
NG
Check/Replace
IC201.
Samsung Electronics
Single Horizontal Line
Normal (24V)
Check
Waveform of IC201
Pins 22,24.
O.K
Normal
Check/Replace
IC301.
Check
Abnormal
24V-C Voltage.
Check
NG
FBT Pin 2 (24V)
Oscillation.
Normal
Check R409 Check/Replace
Open. FBT.
Open
Check/Replace
R409.
Troubleshooting
5-3